Coldwater refers to fish and other aquatic life which live naturally in temperate (between tropical and polar) regions of the world, and thrive at 50- 74°F. This means that in many countries, they can be kept in unheated aquaria.
The number of species of coldwater fish available to the aquarist is far more limited than with their tropical cousins, but this in no way means a less interesting or beautiful set-up. Coldwater fishkeeping has come a long way in the past few years, and (hopefully) we are beginning to see the end of the traditional "goldfish in a bowl".

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